B737-800 first officer reported track and altitude deviations occurred on the JAGGR3 arrival into de...

Narrative:

While on the descent into den we were cleared to descend via the jaggr 3 arrival. The captain was the pilot flying and briefed the arrival followed by the ILS to runway 16L. At approximately point dandd on the arrival; denver approach cleared us to cross qwike at 11;000 ft and to expect the RNAV (rnp) 17R. The captain went heads down and reprogrammed the box and verbally stated that we would use the qwike transition. The approach was briefed appropriately. Shortly thereafter we were cleared the approach. At point staam on the approach; the captain stated that the aircraft wasn't descending to the next altitude. We both looked at the MCP; nd and pfd to verify all appropriate modes. After passing point staam it became evident that our aircraft was not following the RF. The captain quickly took the autopilot off and made a left turn to follow the RF. I went heads down and saw that there was a discontinuity in the FMC where the arrival ended and the approach began. I tried to remedy the problem by closing the discontinuity; but at the same time den approach called informing us we were 1 NM north of the course. They offered the visual approach to 17R and we accepted. The remainder of the flight was uneventful. Any changes in the FMC or control modes needs to be confirmed by both pilots prior to execution. This is a negative trend amongst most pilots.

Original NASA ASRS Text

Title: B737-800 First Officer reported track and altitude deviations occurred on the JAGGR3 Arrival into DEN.

Narrative: While on the descent into DEN we were cleared to descend via the JAGGR 3 Arrival. The Captain was the Pilot Flying and briefed the arrival followed by the ILS to Runway 16L. At approximately point DANDD on the arrival; Denver Approach cleared us to cross QWIKE at 11;000 FT and to expect the RNAV (RNP) 17R. The Captain went heads down and reprogrammed the box and verbally stated that we would use the QWIKE transition. The approach was briefed appropriately. Shortly thereafter we were cleared the approach. At point STAAM on the approach; the Captain stated that the aircraft wasn't descending to the next altitude. We both looked at the MCP; ND and PFD to verify all appropriate modes. After passing point STAAM it became evident that our aircraft was not following the RF. The Captain quickly took the autopilot off and made a left turn to follow the RF. I went heads down and saw that there was a discontinuity in the FMC where the arrival ended and the approach began. I tried to remedy the problem by closing the discontinuity; but at the same time DEN Approach called informing us we were 1 NM north of the course. They offered the Visual Approach to 17R and we accepted. The remainder of the flight was uneventful. Any changes in the FMC or control modes needs to be confirmed by both pilots prior to execution. This is a negative trend amongst most pilots.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1604032
Time
Date	201812
Local Time Of Day	0601-1200
Place
Locale Reference	DEN.Airport
State Reference	CO
Environment
Light	Night
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	STAR JAGGR
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 278
Events
Anomaly	Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

B737-800 first officer reported track and altitude deviations occurred on the JAGGR3 arrival into den.